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PRODUCT DATA
B&K 2245 Sound Level Meter with Noise Partner
The core of the B&K 2245 series
B&K 2245 Sound Level Meter with Noise Partner is a complete
solution for basic noise measurements.
Whether you are a complete novice, occasional user or an
acoustics specialist – sometimes all you need is a simple sound
level meter – one that provides you with reliable, accurate
results without all the fuss. That is what B&K 2245 delivers.
This robust, class 1 sound level meter puts functionality, easeof-use and versatility into the palm of your hand together with
the reliability and confidence that is ensured with the
Brüel & Kjær brand.
Uses and Features
Uses
Features
• Basic noise measurements
• Broadband measurements requiring IEC 61672 compliant
instrumentation
• Simple product testing
• Single measurement range: 16 – 141 dB(A) from noise floor to
maximum level
• Frequency range: 6 Hz – 20 kHz
• 16 GB internal storage
• Automatic measurement transfer for network storage for
backup and analysis
• Robust design for both indoor and outdoor measurements
• Wireless connectivity for remote control of measurements
and data transfers
• Simplified user interface using either the sound level meter or
your iPhone®
• Measurement annotation using photos, audio, text or video
• PC software for data storage, viewing and reporting
• GPS for time and position
• Calibrator auto-detection
• Windscreen auto-detection and compensation
A Complete Solution
B&K 2245 Sound Level Meter is a complete package solution
that includes the Noise Partner app for both mobile
measurement control, display and data transfer and a PC-based
application for analysis and documentation.
Fig. 1 The complete solution: B&K 2245 Sound Level Meter and the
Noise Partner app installed on a mobile phone and PC
The Sound Level Meter
The App
B&K 2245 provides effortless usability with a rubberized body
that is dust- and water-resistant for a more secure grip and
ensured compliance to IP 55. The seven control buttons can be
comfortably operated with one hand, and the instrument’s
clear, bright display shows you the most important information
at a single glance. With a 14-hour battery life, you can be sure it
will not let you down.
Noise Partner app is an intuitive mobile app that extends the
measurement environment to your mobile phone. Monitor and
control the measurement from the phone and easily add
photos, text, voice or videos to document the setup and/or
particular events and situations.
Fig. 3 Control, view and annotate measurements directly from your
mobile phone
Fig. 2 The sound level meter’s lightweight design and user-friendly
display
Quickly confirm
connection to
the instrument
View any
measurement
parameter
Start, stop
pause and
annotate the
measurement
Transfer Data for Analysis
Wireless Connectivity
Using the Noise Partner app on your mobile phone, you can
wirelessly connect to B&K 2245, providing the flexibility to control
your measurements via your mobile phone, avoiding possible body
reflections or unsafe environments. Once the app has connected to
the sound level meter, it will remember the instrument and
automatically connect to it when in range.
B&K 2245 has Bluetooth®, Wi-Fi® and a USB-C connector.
2
When you are done measuring, you can quickly and securely
transfer data to your PC. All data is stored in the instrument,
which can be set up to automatically transfer data whenever it
connects to your local network.
The Noise Partner PC software, which is simple to install and
use with preconfigured, user-friendly tools for presenting and
sharing results, organizes the data intuitively, ready for further
analysis and reporting.
Smart Accessories
Smart Docking Station
B&K 2245 connects to an optional smart docking station that
not only acts as a high-speed charger but also automatically
transfers stored data and annotations to your network for
reporting and analysis. This means the unit is always charged
and ready to go, and you never have to worry about saving the
information you need or about someone deleting your data by
accident – everything is done securely for you.
Fig. 4 B&K 2245 with its optional docking station
A Platform that Helps You Get the Job Done
The B&K 2245 platform includes a range of apps, each tailored
to assist a specific job-to-do. Each instrument can be licenced
for more than one app, so switching tasks is as easy as –
switching apps.
All available mobile apps can be downloaded from the App
Store®. PC apps can be downloaded at www.bksv.com.
• Enviro Noise Partner – for environmental noise surveys that
includes markers to isolate sounds (for example, removing a
barking dog or identifying the moment when a sound source is
operating) and checklists to ensure each step is completed to
local requirements
• Work Noise Partner – for workplace noise surveys that guides
you through a full work day noise exposure calculation.
Frequency analysis is also included, which is perfect for
selecting hearing protectors
Job done.
Other Accessories
From tripods, calibrators, mobile phone holders, and more –
Brüel & Kjær provides you with the accessories you need to
complete any measurement task using B&K 2245.
See “Ordering Information” for a complete overview.
Hassle-free Licencing
Each B&K 2245 licence is installed in the instrument, enabling
measurement functions on the instrument as well as:
• Allowing connections to licenced mobile apps
• Embedding licences in measurement files for editing in
licenced desktop apps
This means there are no licence files to install on the PC, and no
dongles. Mobile and desktop apps can be freely downloaded
and installed on any iPhone and PC, and measurements made
with embedded licences can be edited by the desktop app on
any PC, forever.
3
Compliance with Standards
Safety
Radio Transmission
EMC Emission
EMC Immunity
Temperature
Humidity
Mechanical
Enclosure
The CE marking is the manufacturer's declaration that the product meets the requirements of the applicable EU
directives
RCM mark indicates compliance with applicable ACMA technical standards – that is, for telecommunications, radio
communications, EMC and EME
China RoHS mark indicates compliance with administrative measures on the control of pollution caused by
electronic information products according to the Ministry of Information Industries of the People’s Republic of
China
WEEE mark indicates compliance with the EU WEEE Directive
EN/IEC 61010 - 1, ANSI/UL 61010 - 1 and CSA C22.2 No.1010.1: Safety requirements for electrical equipment for
measurement, control and laboratory use
ETSI EN 300 328 V2.1.1: Wideband transmission systems; Data transmission equipment operating in the 2.4 GHz
ISM band and using wide band modulation techniques; Harmonised Standard covering the essential requirements
of article 3.2 of Directive 2014/53/EU
EN 301 489-1 V2.2.0 Electro Magnetic Compatibility (EMC) standard for radio equipment and services; Part 1:
Common technical requirements; harmonised standard covering the essential requirements of article 3.1(b) of
Directive 2014/53/EU and the essential requirements of article 6 of Directive 2014/30/EU
EN 301 489-17 V3.2.0 Electro magnetic compatibility (EMC) standard for radio equipment and services; Part 17:
Specific conditions for broadband data transmission systems; harmonised standard covering the essential
requirements of article 3.1(b) of Directive 2014/53/EU
EN/IEC 61000 - 6 - 3: Generic emission standard for residential, commercial and light industrial environments
EN/IEC 61326: Electrical equipment for measurement, control and laboratory use – EMC requirements
CISPR 22: Radio disturbance characteristics of information technology equipment. Class B Limits
IEC 61672 - 1, IEC 61260, IEC 60651 and IEC 60804: Instrumentation standards
NOTE: The above is only guaranteed using accessories listed in this document
EN 301 489-1 V2.2.0 Electro Magnetic Compatibility (EMC) standard for radio equipment and services; Part 1:
Common technical requirements; harmonised standard covering the essential requirements of article 3.1(b) of
Directive 2014/53/EU and the essential requirements of article 6 of Directive 2014/30/EU
EN 301 489-17 V3.2.0 Electro Magnetic Compatibility (EMC) standard for radio equipment and services; Part 17:
Specific conditions for broadband data transmission systems; harmonised standard covering the essential
requirements of article 3.1(b) of Directive 2014/53/EU
EN/IEC 61000 - 6 - 2: Generic standard – Immunity for industrial environments
EN/IEC 61326: Electrical equipment for measurement, control and laboratory use – EMC requirements
IEC 61672- 1, IEC 61260, IEC 60651 and IEC 60804: Instrumentation standards
NOTE: The above is only guaranteed using accessories listed in this document
IEC 60068 - 2 - 1 & IEC 60068-2-2: Environmental Testing.
Cold and Dry Heat
Operating Temperature: – 10 to + 50 °C (14 to 122 °F)
Storage Temperature: – 25 to + 70 °C (– 13 to 158 °F)
IEC 60068 -2 -78: Damp Heat: 93% RH (non-condensing at + 40 °C (104 °F)). Recovery time 2  4 hours
Non-operating:
IEC 60068 - 2 - 6: Vibration: 0.3 mm, 20 m/s2, 10 – 500 Hz
IEC 60068 - 2 - 27: Bump: 4000 bumps at 400 m/s2
IEC 60068- 2 - 27: Shock: 1000 m/s2, 5 directions
IEC 60529 (1989): Protection provided by enclosures: IP 55
Specifications – B&K 2245 Sound Level Meter
Microphone
SUPPLIED MICROPHONE
Type 4966: Free-field ½ Microphone
NOMINAL OPEN-CIRCUIT SENSITIVITY
50 mV/Pa (corresponding to  26 dB re 1 V/Pa) ± 1.5 dB
Hardware Interface
CONTROL BUTTONS
7 buttons optimized for measurement control and screen navigation
ON-OFF BUTTON
Press centre button 1 s to turn on; press 2 s to switch off
STATUS INDICATORS
LED light ring visible from a distance, and from most angles: Red, yellow, green, blue, purple
DISPLAY
Transflective back-lit colour touchscreen 240  320 dot matrix
4
DISPLAY BACKLIGHT
Adjustable level and time
USB INTERFACE
Multi-purpose USB-C Connector: Battery charge, data transfer, output signal (frequencyweighted input signal or DC voltage corresponding to measured LAF, LBF, LCF or LZF level)
CLOCK
System time updated from GPS when possible. Drift < 0.26 s per 24-hour period (±3 ppm)
Storage
INTERNAL FLASH-RAM (NON-VOLATILE)
16 GB for measurement data and annotations
Power
EXTERNAL DC POWER SUPPLY REQUIREMENTS
Used to charge built-in battery pack in the instrument
USB CHARGER PART NO.
ZG-0484
USB CHARGER CABLE CONNECTOR
USB-C
USB CHARGER VOLTAGE
5 V DC
USB CHARGER CURRENT
Min. 1.5 A
USB CHARGER VOLTAGE
100 – 120/200 – 240 V AC; 47 – 63 Hz
BATTERY VOLTAGE
3.6 V
BATTERY CAPACITY
6700 mAh nominal, 24 Wh
BATTERY TYPICAL OPERATING TIME
Typically > 14 h with Wi-Fi enabled
BATTERY CYCLE LIFE
Min. 80% battery capacity available after 500 complete charge/discharge cycles
BATTERY INDICATOR
Remaining battery capacity and expected working time may be read out in % or hours
BATTERY FUEL GAUGE
The instrument is equipped with a built-in fuel gauge, which continuously measures and
stores the actual battery capacity in the battery unit
CHARGE TIME
Typically < 6 hours from empty at normal room temperature.
NOTE: It is not recommended to charge the battery at temperatures below 0 °C (32°F) or
over 50°C (122 °F). Doing this will reduce battery lifetime
Environmental
START-UP TIME
From Power Off: <30 s
WEIGHT
370 g (13 oz)
DIMENSIONS
260  68  37 mm (10.2  2.7  1.5) including preamplifier and microphone
Wireless Connection to Mobile Phone
OPERATING FREQUENCY
2.4 GHz
DATA RATE
IEEE 802.11n
Up to 300 Mbps
IEEE 802.11g
Up to 54 Mbps
IEEE 802.11b
Up to 11 Mbps
ENCRYPTION/AUTHENTICATION
64/128-bit WEP, WPA-PSK, WPA2-PSK, TLS, SSL
RANGE
The range is similar to a standard WLAN unit, typically from 10 to 50 m (33 to 164 ft),
depending on the environment and the number of other WLAN transmitters in the area
(smartphones, Wi-Fi, etc.)
BLUETOOTH® CONNECTION
Bluetooth Low Energy (BLE) to discover and connect devices, allowing for simpler
connections on Wi-Fi, etc. Not used for transporting measurement data
Wired Connection to PC and Docking Station
CONNECTIONS
USB-C, Ethernet over USB
DATA RATE
150 Mbps
ENCRYPTION/AUTHENTICATION
TLS, SSL
5
Software Interface
PREFERENCES
Date, time and number formats can be specified
LANGUAGE
User interface in Catalan, English, French, German, Italian and Spanish
HELP
On app: Concise context-sensitive help in English, French, German, Italian and Spanish
UPDATE OF SOFTWARE
Update to latest version via Internet*
REMOTE ACCESS
Connect to the instrument via mobile phone downloaded with:
• Noise Partner BZ-7300
• Other optional apps also available – see Ordering Information
Remote display (non-interactive) via internal web server
* For Welmec type-approved instruments, updates must be performed at a Brüel & Kjær service centre.
Input
CORRECTION FILTERS
The software is able to correct the frequency
response to compensate for sound field and
accessories
Sound Field: Free-field or diffuse-field for Type 4966
SELF-GENERATED NOISE LEVEL
Typical values at 23 °C for nominal microphone
open-circuit sensitivity
A-weighting: Microphone: 14.9 dB
Electrical: 9.8 dB
Total: 16.1 dB
Accessories: Windscreen UA-1650
B-weighting: Microphone: 13.7 dB
Electrical: 9.5 dB
Total: 15.1 dB
C-weighting: Microphone: 13.8 dB
Electrical: 12.2 dB
Total: 16.1 dB
Z-weighting: Microphone: 15.5 dB
Electrical: 18.8 dB
Total: 20.5 dB
Calibration
Initial calibration is stored for comparison with later calibrations.
ACOUSTIC
Using Sound Calibrator Type 4231 or custom calibrator. The calibration process automatically
detects the calibration level when Sound Calibrator Type 4231 is used
CALIBRATION HISTORY
Calibrations and calibration checks are listed and can be viewed on the instrument
Data Management
MEASUREMENT DATA
Measurements are automatically stored on measurement stop. Data is stored in folders by
date, with individual measurements numbered sequentially
ANNOTATION DATA
Annotations (photos, videos, text and voice notes) made using the Noise Partner mobile app
are embedded into measurement data and stored on the instrument
DATA RETENTION
The instrument can be configured to automatically move previously downloaded data to
trash after a user-defined retention period
BACKUP
Measurement and annotation data can be automatically backed up to a USB stick or SMB
network share
Measurement Control
FREE
Manually controlled single measurement
PRESET
Preset measurement time from 1 second to 31 days in 1 s steps
MANUAL CONTROLS
Start, Pause, Continue and Stop the measurement manually
BACK-ERASE
The last 1 to 10 s of data can be erased without resetting the measurement
6
Measurement Status
ON SCREEN
Information such as overload and running/paused are displayed on screen as icons
MEASUREMENT STATUS LIGHT RING
RGB light right shows the measurement status
and instantaneous overload as follows
Green on constantly: Measuring
Yellow flashing every 5 s: Stopped, ready to measure
Yellow flashing slowly: Paused, measurement not stored
Red flashing quickly: Intermittent overload, calibration failed
Purple on constantly: Latched overload
Software Specifications – Noise Partner BZ-7300
System Requirements for Apps
PC OPERATING SYSTEM
Windows® 7, 8.1 or 10 (64-bit)
PC FRAMEWORK*
Microsoft® .NET 4.7.2
MOBILE PHONE
iPhone®
iOS
See supported iOS versions for current app version in the App Store, under Noise Partner >
Information > Compatibility
* The software will check if pre-installed. If it is not, it will start auto-installation. Accept the installation to run the app.
Recommended PC for PC App
Intel® Core™ i5 or better
8 GB of memory
Sound card
At least one available USB port
Solid State Drive
Microsoft Office 2016 or later
Standards
Conforms with the following national and international standards
IEC – INTERNATIONAL ELECTROTECHNICAL
COMMISSION*
(Commission électrotechnique internationale)
IEC 61672- 1 (2013) class 1
IEC 60651 (1979) plus Amendment 1 (1993- 02 ) and Amendment 2 (2000 -10 ), type 1
IEC 60804 (2000 - 10), type 1
DIN – DEUTSCHES INSTITUT FÜR NORMUNG E.V. DIN 45657 (1997 - 07 )
(the German Institute for Standardization)
ANSI – AMERICAN NATIONAL STANDARDS
INSTITUTE
ANSI S1.4 - 1983 plus ANSI S1.4A - 1985 Amendment, type 1
ANSI/ASA S1.4 – 2014, class 1
ANSI S1.43 – 1997, type 1
* The international IEC standards are adopted as European standards by CENELEC. When this happens, the letters IEC are replaced with EN and the number is
retained. The instrument also conforms to these EN standards
Analysis
DETECTORS
Parallel detectors on every measurement
A, B, C or Z Two simultaneous broadband frequency weightings. F, S and I
exponential time weightings, linear averaging and peak detector
simultaneously for each frequency weighting
Overload Detector Monitors the overload outputs of all the frequency weighted
channels
MEASUREMENT PARAMETERS
X = frequency weightings A, B, C or Z
Y = time weightings F or S
Sound Input for Display Start Time
and Storage
LAIeq
Sound Input Only for LXY
Display as Numbers or
Quasi-analog Bars
Elapsed Time
LXeq
LXpeak
LAImax
LXYmax
LXYmin
LXY(SPL)
7
MEASURING RANGES
Dynamic Range: (From typical noise floor to max. level for a 1 kHz pure tone
signal): A-weighted: 16.1 to 140.9 dB
Primary Indicator Range (in accordance with IEC 60651): A-weighted: 21.4 dB to 123.6 dB
Linearity Range (in accordance with IEC 60804): A-weighted: 19.3 dB to 142.1 dB
Linear Operating Range (in accordance with IEC 61672):
• A-weighted: 1 kHz: 22.7 dB to 140.9 dB
• C-weighted: 24.9 dB to 140.9 dB
• Z-weighted: 31.6 dB to 140.9 dB
Peak C Range (in accordance with IEC 61672): 1 kHz: 41.7 dB to 143.9 dB
Displays on Instrument
SLM VIEW
One quasi-analogue instantaneous bar and one broadband value
LIST VIEW
One quasi-analogue instantaneous bar and three broadband values
ABOUT DATA VIEW
Latitude, longitude, microphone sensitivity, calibrated date, time zone, software version and
hardware version for current measurement
Displays on Mobile App
XL TOTAL VIEW
One quasi-analogue instantaneous bar and one broadband value
TOTAL LIST VIEW
One quasi-analogue instantaneous bar and five broadband values
Ordering Information
Type 2245-N-S
B&K 2245 Sound Level Meter with Noise Partner
Software
which includes the following in a hard shell transport case (KE-1034):
• B&K 2245 Sound Level Meter
• BZ-7300-N: Noise Partner
• Type 4966: ½ Free-field Microphone
• ZG-0484: Mains Power Supply
• AO-0821-D-010: USB 3, USB C to USB A Cable (1.0 m/3.3 ft)
• UA-1650: 90 mm dia. Windscreen with AutoDetect
• DH-0819: Wrist Strap, for sound level meter
• UA-2237: Mobile Phone Holder Kit, for use on tripod
B&K 2245 Sound Level Meter with Noise Partner
Software and Sound Calibrator Type 4231
which includes the following in a hard shell case (KE-1034):
• B&K 2245 Sound Level Meter
• BZ-7300-N: Noise Partner
• Type 4966: ½ Free-field Microphone
• Type 4231: Sound Calibrator
• ZG-0484: Mains Power Supply
• AO-0821-D-010: USB 3, USB C to USB A Cable (1.0 m/3.3 ft)
• UA-1650: 90 mm dia. Windscreen with AutoDetect
• DH-0819: Wrist Strap, for sound level meter
• UA-2237: Mobile Phone Holder Kit, for use on tripod
Software and Accessories Available Separately
Service Products
SOFTWARE MODULES
BZ-7301
Enviro Noise Partner
BZ-7302
Work Noise Partner
All mobile apps are available for download via the App Store®.
All PC apps can be downloaded at www.bksv.com.
MAINTENANCE
2245-EW1
CALIBRATION
Type 4231
Sound Calibrator (fits in transport case)
MOUNTING
UA-0750
UA-0801
UA-1651
Tripod
Lightweight Tripod
Tripod Extension
Brüel & Kjær and all other trademarks, service marks, trade names, logos and product names are the property of Brüel & Kjær or a third-party company.
Brüel & Kjær Sound & Vibration Measurement A/S
DK-2850 Nærum · Denmark · Telephone: + 45 77 41 20 00 · Fax: + 45 45 80 14 05
www.bksv.com · info@bksv.com
Local representatives and service organizations worldwide
Although reasonable care has been taken to ensure the information in this document is accurate, nothing
herein can be construed to imply representation or warranty as to its accuracy, currency or completeness, nor
is it intended to form the basis of any contract. Content is subject to change without notice – contact
Brüel & Kjær for the latest version of this document.
© Brüel & Kjær. All rights reserved.
2019-04
ACCREDITED CALIBRATION
SLM-SIM-CAF
SLM Simple, Accredited Calibration incl.
microphone
SLM-SIM-CAI
SLM Simple, Initial Accredited Calibration incl.
microphone
BP 0029 – 11
AO-0846
4.7” App Control Unit, 32 GB
Desktop Base Station, including power supply and
LAN cable
USB-C Output Cable, with power
Extended Warranty, one year extension
ËBP-0029---4Î
INTERFACING
UL-1073
UL-0089
Type 2245-N-SC
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